Wyniki wyszukiwania - BazTech

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Aparat hybrydowy ze złożem ziarnistym w instalacji spalania odpadów

Hehlmann J., Pietrasik E., Kujawska E., Bania D.

Rocznik Ochrona Środowiska

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2009

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Tom 11

281-297

EN

Combustion of municipal and industrial waste is widely used method of utilization. However it is accompanied by a number of problems, mainly related to ensuring dequate calorific value and reducing emission of pollutants in the exhaust gas (dust, sulfur dioxide, carbon monoxide, nitrogen oxides, dioxins and PAHs).The designed waste incinerating plants equipped with complex systems of harmful compounds emission reduction, flue gas treatment and disposal of ashes accounts for 75% of the whole incinerating plant capital costs. The way to reduce costs can be a usage of the flue gas heat for drying specially preparated bed. This bed purifies flue gas from the dust and gas components and then undergoes co-combustion with waste, contributing to an increase of calorific value and stabilization of the combustion process. This paper presents potential use of the apparatus with sliding granular bed as a hybrid device for simultaneous removal of solid and gas pollutants from flue gas, as well as skin-drying of the bed. Finding this solution advisible, comprehensive process researches of the gas cleaning, drying and gas pressure drop across model granular beds have been carried out. The laboratory installation enabled measurement of gas cleaning effectiveness, rate of bed drying and gas pressure drop in its variables; flow velocity in the range of w0=<0.1...1>m/s, temperatures t=<90...190>deg. C dust concentration cp=<1...10>ź10-3 kg/m3 and also different parameters of the bed have been used. Based on the collected results, the criterion equations of gas cleaning process, drying and pressure drop for model granular beds have been developed. Research and analysis of the results showed that: 1) the drying of waste prior to their thermal disposal gives the possibility of increasing their calorific value for about 27÷30%, which translates directly into the calorific effect of the boiler, 2) the possibility to obtain the gas cleaning efficiency in the range of 60 to 99.9%. Such solution may be a first stage of dedusting or a final one, depending on the structure of bed, dust and gas properties and selected load of filtration surface as well as the sequences of apparatuses in the line of flue gas treatment from the municipal waste incinerating installation. Developed calculation methods are helpful in designing equipment for the beds drying and waste gases cleaning in the waste disposal process i.e.: in waste incinerating plants, in the plants of formed biofuel production, or when inert beds are used as high performance filter deduster especially in the case of high-temperature gases with recovery of the powdery product (eg. installation of Titanium White).

2

Oczyszczanie gazów gardzielowych w hutach miedzi

Hehlmann J., Domalik B.

Chemik

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2005

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Vol. 58, nr 6

286-288

PL

Zaprezentowano wyniki badań przeprowadzonych w hucie miedzi, na instalacji mokrego oczyszczania gazów gardzielowych. Zastosowanie hybrydowego aparatu z wypełnieniem komórkowym, jest propozycją modernizacji istniejącego węzła, radykalnie zwiększającą skuteczność procesów: odpylania i równoczesnego schładzania zanieczyszczonych gazów. Analiza jakościowa mediów wlotowych i wylotowych wskazuje na zjawisko kondensacji i eliminacji z gazu, toksycznych i kancerogennych, związków metali ciężkich.

EN

This paper presents the results of researches conducted in copper works, on the wet dedusting blast-furnace gases installation. The application of hybrid apparatus with cellular packing is a proposition of existing installation modernization, radically improving the efficiency of processes: dedusting and simultaneous cooling of polluted gases. Qualitative analysis of inlet and outlet media, indicates the phenomenon of condensation and elimination from the gas, the toxic and carcinogenic of heavy metals compounds.

3

Absorpcja gazów resztkowych w aparacie hybrydowym z wypełnieniem komórkowym

Hehlmann J., Kiraga K.

Chemik

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2005

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Vol. 58, nr 6

290-291

PL

Przedmiotem artykułu są badania procesu absorpcji w aparacie hybrydowym z wypełnieniem komórkowym. W wyniku analizy modelowego procesu wnikania masy z natychmiastową, nieodwracalną reakcją chemiczną oraz procesu absorpcji fizycznej z bardzo dobrą rozpuszczalnością składnika gazowego, opracowano równanie korelacyjne umożliwiające projektowanie wysokosprawnych kolumn z ich stosowaniem w procesach technologicznych i ochronie środowiska.

EN

The article presents investigations of absorption processes in a hybrid-type unit with cellular packing. In the consequence of analysis of mass ex-change processes with instantaneous, irreversible reaction and analysis of physical absorption with very good solubility of gas component, correlation equations which made possible the design of high-eficiency column in technological proceses and environmental protection have been elaborated.